Static force level gauge cable-stayed bridge monitoring device based on Beidou positioning

Abstract

The utility model discloses a static leveling instrument cable-stayed bridge monitoring device based on Beidou positioning, and relates to the technical field of monitoring. The static leveling instrument comprises a static leveling instrument, the bottom of the static leveling instrument is fixedly connected with a support, the bottom of the support is rotationally connected with a supporting rod, the front side of the support is fixedly connected with a transverse rod through a connecting piece, and the front side of the support is provided with a camera. By arranging the static level gauge, the support, the supporting rod, the rotating block, the fixing ring, the transverse rod and the signal transceiver, the supporting rod and the transverse rod form an extending support through the rotating block and the fixing ring, the signal transceiver is erected to an unshielded area on the outer side of a pier, it is ensured that Beidou satellite signals are stably received, and the static level gauge provides local settlement data; the method is integrated with the absolute coordinate data of Beidou positioning and the deformation data of the cross bar, compensates the limitation of a single sensor through an algorithm, improves the precision of settlement monitoring in a complex environment, and guarantees the long-term monitoring reliability.

Description

Technical Field

[0001] This utility model relates to the field of monitoring technology, specifically a hydrostatic leveling device for cable-stayed bridges based on BeiDou positioning. Background Technology

[0002] A static level is a precision instrument used to measure elevation differences and their changes. It is primarily used for monitoring vertical displacement and tilt in structures such as pipe corridors, dams, nuclear power plants, high-rise buildings, foundation pits, tunnels, bridges, and subways. Static levels are typically installed on piers at the same height as the object being measured or on the contour lines of the object's walls. Data is usually automatically collected and stored in the field acquisition system via a built-in standalone acquisition software. The data is then transmitted to a backend network software via wired or wireless communication, enabling automated observation.

[0003] Existing hydrostatic levels are generally installed at the lower part of the bridge piers to detect settlement by measuring the internal water pressure. However, the top of the bridge piers is usually the bridge deck, which affects the positioning of the level using the Beidou satellite, causing inaccurate positioning and thus affecting the normal operation of the equipment. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a static leveling instrument for cable-stayed bridges based on BeiDou positioning, so as to solve the technical problem that the bridge deck obstruction affects the positioning of the leveling instrument using BeiDou satellite.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hydrostatic leveling device for monitoring cable-stayed bridges based on BeiDou positioning, comprising a hydrostatic level, a bracket fixedly connected to the bottom of the hydrostatic level, a support rod rotatably connected to the bottom of the bracket, a crossbar fixedly connected to the front side of the bracket via a connector, a camera disposed on the front side of the bracket, a scale fixedly connected to the top of one side of the crossbar, and a transmitting mechanism rotatably connected to one end of the crossbar, the transmitting mechanism comprising a mounting frame, and a signal transceiver fixedly connected to one side of the mounting frame.

[0006] By adopting the above technical solutions, the fixed connection between the hydrostatic level and the support ensures that the water pressure sensor is in direct contact with the bridge pier to detect settlement changes in real time. The rotating connection between the support rod and the support allows for flexible adjustment of the extension direction of the signal transceiver to avoid bridge deck obstruction and ensure high-precision reception of BeiDou signals.

[0007] Furthermore, the launching mechanism also includes a counterweight, a mounting plate, and a laser emitter. The bottom of the mounting frame is fixedly connected to the counterweight, the top of the mounting frame is inserted into both sides of the mounting plate, and the top of the mounting plate is fixedly connected to the outer wall of the laser emitter.

[0008] By adopting the above technical solution, the counterweight of the transmitting mechanism keeps the mounting frame vertical through gravity, ensuring that the laser beam of the laser transmitter is parallel to the ground, forming a stable horizontal reference line, and avoiding measurement errors caused by equipment tilt.

[0009] Furthermore, the connector is fixedly connected by bolts and brackets, and the connector is fixedly connected to the other end of the crossbar. One end of the support rod is fixedly connected to the middle of the crossbar. The front end of the bracket is inserted into the camera. The bottom of the scale is fixedly connected to the top of the connector.

[0010] By adopting the above technical solution, the connector is fixed to the bracket with bolts to ensure the rigid connection between the crossbar and the bracket, preventing structural loosening caused by bridge vibration. The fixed connection between the middle of the crossbar and the support rod forms a triangular support structure, which enhances the overall resistance to wind load and mechanical deformation.

[0011] Furthermore, the bracket has an L-shaped structure, and bolt holes are provided at both ends of the L-shape.

[0012] By adopting the above technical solution, the L-shaped structure of the bracket is fixed to the bridge pier at two points through bolt holes at both ends, which enhances the installation stability and avoids the risk of tilting or falling off caused by single-point fixing.

[0013] Furthermore, a rotating block is rotatably connected to one end of the support rod, and a fixing ring is provided on one side of the rotating block, the fixing ring being adapted to the crossbar.

[0014] By adopting the above technical solution, the support rod is connected to the fixing ring of the crossbar through the rotating block, which allows the support rod to adjust its angle freely during installation, ensuring a stable connection with different crossbars and optimizing the quality of BeiDou signal reception.

[0015] In summary, the present invention has the following main advantages:

[0016] 1. This utility model sets up a static level, a bracket, a support rod, a rotating block, a fixed ring, a crossbar, and a signal transceiver. The support rod and the crossbar form an extended bracket through the rotating block and the fixed ring, and the signal transceiver is set up in an unobstructed area outside the bridge pier to ensure stable reception of Beidou satellite signals. The transmitting mechanism automatically keeps the laser transmitter vertical through a counterweight. Combined with the laser offset when the crossbar is drooping, the data is captured by a camera to dynamically correct the error caused by mechanical deformation of Beidou positioning data. The static level provides local settlement data, which is fused with the absolute coordinate data of Beidou positioning and the deformation data of the crossbar. The algorithm compensates for the limitations of a single sensor, improves the accuracy of settlement monitoring in complex environments, and ensures long-term monitoring reliability.

[0017] 2. This utility model sets up a camera, a scale, and a transmitting mechanism. The counterweight of the transmitting mechanism keeps the laser emitter vertically projected. When the crossbar droops, the laser beam forms a stable offset reference on the scale, avoiding manual calibration errors. The camera captures the changes in the position of the laser point in real time. Combined with the scale markings on the scale, the drooping distance at the end of the crossbar can be directly quantified, realizing non-contact, high-sensitivity deformation monitoring. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the bracket of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the crossbar of this utility model;

[0021] Figure 4 This is a schematic diagram of the exploded three-dimensional structure of this utility model.

[0022] In the diagram: 1. Static level; 2. Bracket; 3. Support rod; 301. Rotating block; 302. Fixing ring; 4. Crossbar; 5. Camera; 6. Scale; 7. Signal transceiver; 8. Connector; 9. Bolt hole; 10. Transmitting mechanism; 101. Mounting bracket; 102. Counterweight; 103. Mounting plate; 104. Laser transmitter. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] A hydrostatic leveling device for monitoring cable-stayed bridges based on BeiDou positioning, such as... Figures 1-4 As shown, the system includes a static level 1, with a bracket 2 fixedly connected to the bottom of the static level 1. A support rod 3 is rotatably connected to the bottom of the bracket 2. A crossbar 4 is fixedly connected to the front of the bracket 2 via a connector 8. A camera 5 is installed on the front of the bracket 2. A scale 6 is fixedly connected to the top of one side of the crossbar 4, and a transmitting mechanism 10 is rotatably connected to one end of the crossbar 4. The transmitting mechanism 10 includes a mounting frame 101, with a signal transceiver 7 fixedly connected to one side of the mounting frame 101. The crossbar 4 is fixed to the bracket 2 via the connector 8, forming a cantilever structure that extends to the outside of the pier. In conjunction with the transmitting mechanism 10, the system uses laser projection and the scale 6 to achieve real-time monitoring of the crossbar's sagging deformation. The camera 5 captures laser offset data, which, together with the static level and Beidou positioning data, corrects errors, significantly improving the reliability and anti-interference capability of settlement detection.

[0025] See Figure 3 The transmitting mechanism 10 also includes a counterweight 102, a mounting plate 103, and a laser emitter 104. The bottom of the mounting frame 101 is fixedly connected to the counterweight 102, the top of the mounting frame 101 is inserted into both sides of the mounting plate 103, the top of the mounting plate 103 is fixedly connected to the outer wall of the laser emitter 104, and the mounting frame 101 is rotatably connected to the crossbar 3. In the event of strong winds, it can filter out unqualified data based on the video from the camera 5. The insertion design of the mounting plate 103 and the mounting frame 101 facilitates the rapid installation and maintenance of the laser emitter 104 and reduces the complexity of equipment deployment.

[0026] See Figure 1 , Figure 2 and Figure 4 The connector 8 is fixedly connected to the bracket 2 by bolts, and the other end of the connector 8 is fixedly connected to the crossbar 4. One end of the support rod 3 is fixedly connected to the middle of the crossbar 4. The front end of the bracket 2 is inserted into the camera 5. The bottom of the scale 6 is fixedly connected to the top of the connector 8. The fixing of the bottom of the scale 6 to the connector 8 ensures the accuracy of the scale reference and improves the accuracy of the laser offset calculation. The insertion of the camera 5 into the bracket 2 facilitates quick installation and improves the installation speed.

[0027] See Figure 1 , Figure 2 and Figure 4 The bracket 2 has an L-shaped structure, and bolt holes 9 are provided at both ends of the L-shape. The L-shaped structure can support the static level 1 and the crossbar 4. The symmetry of the bolt holes 9 allows the bracket 2 to be stably installed on the bridge pier, adapting to the needs of various monitoring scenarios.

[0028] See Figure 1 and Figure 4 One end of the support rod 3 is rotatably connected to a rotating block 301. A fixing ring 302 is provided on one side of the rotating block 301. The fixing ring 302 is adapted to the crossbar 4. The adaptation of the fixing ring 302 to the crossbar 4 can improve the fixing effect of the crossbar 4, and thus can be reliably connected by welding or bolting.

[0029] The implementation principle of this utility model is as follows: First, the bracket 2 is fixed at the bottom of the bridge pier to avoid wind interference. Then, the crossbar 4 and the support rod 3 are fixed to the bracket 2 respectively. Then, the crossbar 4 and the support rod 3 are fixedly connected by the fixing ring 302 to form a reliable triangular support. The signal transceiver 7 (integrated Beidou module) at the top of the support rod 3 extends to the open area outside the bridge deck to receive unobstructed satellite signals and obtain accurate three-dimensional coordinate data of the bridge pier. The Beidou positioning data is transmitted to the external monitoring system in real time through the signal line.

[0030] The hydrostatic level 1 detects minute settlements of the bridge piers through an internal water pressure sensor and generates level settlement data.

[0031] The counterweight 102 of the transmitting mechanism 10 uses gravity to keep the mounting bracket 101 vertical, ensuring that the laser beam of the laser transmitter 104 is parallel to the ground. Since the transmitting mechanism 10 and the signal transceiver 7 are integrated, when the crossbar 4 droops due to its own gravity, the projection position of the laser beam on the scale 6 is shifted. The camera 5 captures the change in the position of the laser point and calculates the drooping distance at the end of the crossbar.

[0032] The system combines and compares BeiDou positioning data (absolute position), hydrostatic level water pressure data (relative settlement), and crossbar sag deformation (mechanical deformation compensation). After the BeiDou positioning data is corrected by the crossbar sag deformation data, the difference between the BeiDou positioning data and the initial measurement data after installation is obtained. Then, the settlement value obtained by the hydrostatic level water pressure data is compared, and a high-precision pier settlement result is output, thus completing the reliable detection of settlement.

[0033] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A hydrostatic leveling device for monitoring cable-stayed bridges based on BeiDou positioning, characterized in that: The instrument includes a static level (1), a bracket (2) is fixedly connected to the bottom of the static level (1), a support rod (3) is rotatably connected to the bottom of the bracket (2), a crossbar (4) is fixedly connected to the front side of the bracket (2) through a connector (8), a camera (5) is provided on the front side of the bracket (2), a scale (6) is fixedly connected to the top of one side of the crossbar (4), and a transmitting mechanism (10) is rotatably connected to one end of the crossbar (4). The transmitting mechanism (10) includes a mounting frame (101), and a signal transceiver (7) is fixedly connected to one side of the mounting frame (101).

2. The hydrostatic leveling device for cable-stayed bridges based on BeiDou positioning as described in claim 1, characterized in that: The launching mechanism (10) also includes a counterweight (102), a mounting plate (103), and a laser emitter (104). The bottom of the mounting bracket (101) is fixedly connected to the counterweight (102), the top of the mounting bracket (101) is inserted into both sides of the mounting plate (103), and the top of the mounting plate (103) is fixedly connected to the outer wall of the laser emitter (104).

3. The hydrostatic leveling device for cable-stayed bridges based on BeiDou positioning as described in claim 1, characterized in that: The connector (8) is fixedly connected to the bracket (2) by bolts, and the other end of the connector (8) is fixedly connected to the crossbar (4). One end of the support rod (3) is fixedly connected to the middle of the crossbar (4). The front end of the bracket (2) is inserted into the camera (5). The bottom of the scale (6) is fixedly connected to the top of the connector (8).

4. The hydrostatic leveling device for cable-stayed bridges based on BeiDou positioning as described in claim 1, characterized in that: The bracket (2) has an L-shaped structure, and bolt holes (9) are provided at both ends of the L-shape.

5. The hydrostatic leveling device for cable-stayed bridges based on BeiDou positioning as described in claim 1, characterized in that: One end of the support rod (3) is rotatably connected to a rotating block (301), and a fixing ring (302) is provided on one side of the rotating block (301). The fixing ring (302) is adapted to the crossbar (4).

Images